WS2.1Book:
Lyell, Charles. 1835. Principles of geology: being an inquiry how far the former changes of the Earth's surface are referable to causes now in operation. 4th ed. London: John Murray. Volume 1.TextImagePDF

2.

WS2.4Book:
Lyell, Charles. 1835. Principles of geology: being an inquiry how far the former changes of the Earth's surface are referable to causes now in operation. 4th ed. London: John Murray. Volume 4.TextImagePDF

3.

WS2.2Book:
Lyell, Charles. 1835. Principles of geology: being an inquiry how far the former changes of the Earth's surface are referable to causes now in operation. 4th ed. London: John Murray. Volume 2.TextImagePDF

4.

WS2.3Book:
Lyell, Charles. 1835. Principles of geology: being an inquiry how far the former changes of the Earth's surface are referable to causes now in operation. 4th ed. London: John Murray. Volume 3.TextImagePDF